G T Smith wrote:
VMS if I remember correctly defaulted to 3 being available but the version numbers incremented (on the setup I was working one could flag files to be archived overnight and ask for them back later). Most editing applications I have dealt with create a backup copy by default so three versions is only a minor improvement.
ICL's George 3 had this some 5-10 years before VMS (late 60s perhaps, definitely by early 70s). Files were version-numbered and George automatically saved them to tape and retrieved them as necessary, depending on disk availability (I remember using 8 MB disks the size of washing machines). It managed all the tape volumes, knowing just where every version of every file was. The filesystem also had user and group access control bits :) http://www.icl1900.co.uk/g3/filestor.html It's interesting watching people reinvent wheels over and over again. Cheers, Dave -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org